<http://webisa.webdatacommons.org/168713059>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<google.es> .
<http://webisa.webdatacommons.org/168713059>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/168713059>	<http://www.w3.org/ns/prov#value>	"M is an alkali metal, preferably Na or K, and more preferably Na;" .
<http://webisa.webdatacommons.org/prov/131693183>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/168713059> .